Title:
Sheet metal fittings
United States Patent 2963783
US Patent References:
/0296786.html
- - 0296786

/0565499.html
- - 0565499

/1094309.html
- - 1094309

/1159422.html
- - 1159422

Flue and flue section
- - 1416334


Inventors:
Preston, Field Jesse
Publication Date:
12/13/1960
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Assignee:
WILLIAMSON COMPANY
Primary Class:
428/581
Other Classes:
428/595, 428/582, 285/424, 285/189, 285/183
International Classes:
B21C37/28; B21C37/29; F16L41/02; F16L41/08; B21C37/15
US Patent References:
2101311Flanged tubular article and method of making same
2130161Hand truck body assembly and method
2155871Metal receptacle
2477315Expansible pipe fitting
2799518Heating conduit connection with spring latch and baffle